Advantages of superconducting quantum interference device-detected magnetic resonance over conventional high-frequency electron paramagnetic resonance for characterization of nanomagnetic materials
Advantages of superconducting quantum interference device-detected magnetic resonance over conventional high-frequency electron paramagnetic resonance for characterization of nanomagnetic materials
复制标题
超导量子干涉装置检测磁共振相对于传统高频电子顺磁共振在纳米磁性材料表征方面的优势
DOI：
10.1063/1.1850816
复制
发表时间：
2005
影响因子：
3.2
通讯作者：
N. Dalal
中科院分区：
文献类型：
--
作者：
B. Cage;S. Russek;D. Zipse;N. Dalal
基于标准超导量子干涉装置（SQUID）磁强计的直流检测高频电子顺磁共振（HF-EPR）技术比传统的基于微波吸收测量的高频电子顺磁共振（HF-EPR）技术具有显著的优势。基于squid的技术提供了直流磁矩作为微波功率、磁场和温度的函数的定量测定。获得的EPR光谱不包含在标准单通传输模式HF-EPR中常见的线形变化和分裂。我们通过比较基于squid和传统微波吸收EPR系统的Fe8分子纳米磁体的EPR光谱来证明改进的性能。
A dc-detected high-frequency electron paramagnetic resonance (HF-EPR) technique, based on a standard superconducting quantum interference device (SQUID) magnetometer, has significant advantages over traditional HF-EPR based on microwave absorption measurements. The SQUID-based technique provides quantitative determination of the dc magnetic moment as a function of microwave power, magnetic field and temperature. The EPR spectra obtained do not contain variability in the line shape and splittings that are commonly observed in the standard single-pass transmission mode HF-EPR. We demonstrate the improved performance by comparing EPR spectra for Fe8 molecular nanomagnets using both SQUID-based and conventional microwave-absorption EPR systems.